70719977 has 2 divisors, whose sum is σ = 70719978. Its totient is φ = 70719976.

The previous prime is 70719953. The next prime is 70720031. The reversal of 70719977 is 77991707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57441241 + 13278736 = 7579^2 + 3644^2 .

It is an emirp because it is prime and its reverse (77991707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70719977 - 2¹⁰ = 70718953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70719947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35359988 + 35359989.

It is an arithmetic number, because the mean of its divisors is an integer number (35359989).

Almost surely, 2^70719977 is an apocalyptic number.

It is an amenable number.

70719977 is a deficient number, since it is larger than the sum of its proper divisors (1).

70719977 is an equidigital number, since it uses as much as digits as its factorization.

70719977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194481, while the sum is 47.

The square root of 70719977 is about 8409.5170491533. The cubic root of 70719977 is about 413.5366801348.

The spelling of 70719977 in words is "seventy million, seven hundred nineteen thousand, nine hundred seventy-seven".